<template>
  <div id="app">
    <el-container class="home-container">
      <!-- 头部 -->
      <el-header>
        <div>
          <img src="../assets//logo.png" alt />
          <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
      <!-- 主体 -->
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse?'64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单 -->
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409eff"
            :unique-opened="true"
            :collapse="isCollapse"
            :collapse-transition="false"
            :router="true"
            :default-active="activePath"
          >
            <!-- 一级菜单 -->
            <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>

              <!-- 二级菜单 -->
              <el-menu-item
                :index="'/'+subItem.path"
                v-for="subItem in item.children"
                :key="subItem.id"
                @click="saveNavState('/'+subItem.path)"
              >
                <template slot="title">
                  <!-- 图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 右侧内容 -->
        <el-main>
          <!-- 路由占位 -->
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //导航菜单渲染
      menulist: [],
      iconsObj: {
        125: "iconfont icon-user",
        103: "iconfont icon-tijikongjian",
        101: "iconfont icon-shangpin",
        102: "iconfont icon-danju",
        145: "iconfont icon-baobiao",
      },
      //菜单是否折叠
      isCollapse: false,
      //激活的链接地址
      activePath: "",
    };
  },
  created() {
    this.getMenulikt();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    //退出账号
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获取菜单
    async getMenulikt() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status == 200) {
        this.menulist = res.data;
      } else {
        return this.$message.error(res.meta.msg);
      }
    },
    //点击按钮，切换菜单的折叠展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    //保存链接激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    },
  },
};
</script>

<style lang="less" spcoed>
#app,
.home-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;

  > div {
    display: flex;
    align-items: center;

    span {
      margin-left: 20px;
    }

    img {
      height: 50px;
      width: 50px;
    }
  }
}

.el-aside {
  background-color: #333744;

  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>